Matter Eater Lad
The DC based Matter Eater Lad is basically a human garbage disposal. He hails from planet Bismoll, whose inhabitants developed the talent for eating anything and everything after microbes rendered their normal food inedible. As a member of the Legion of Superheroes, he once saved the Earth by eating the "indestructible" Miracle Machine. We're not sure what that is, but it sure sounds delicious.